Why is hydration crucial during exercise, especially for individuals with medical conditions?

Hydration is crucial during exercise, particularly for individuals with medical conditions, because it prevents dehydration. When the body loses fluids through sweat and respiration during physical activity, it can lead to a decrease in blood volume, impairing the heart's ability to pump blood and reducing the delivery of oxygen and nutrients to muscles. Dehydration can also adversely affect bodily functions, including temperature regulation and metabolic processes, making it even more important for those with medical conditions that may already challenge their systems.

Proper hydration helps maintain electrolyte balance and muscle function, which is vital during exercise. For individuals with existing medical issues, dehydration can exacerbate their conditions, increase fatigue, and lead to serious complications. Therefore, maintaining adequate fluid intake is fundamental not only for optimal performance but also for safety and health during physical activity.